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MagnaFlow OEM Grade Direct-Fit Catalytic Converter 51812 for the 2011-2019 Chevrolet Silverado 3500 HD / 2500 HD

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MagnaFlow 51812 oem grade direct-fit catalytic converter, front three-quarter view of the turntable spin

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MagnaFlow 51812 oem grade direct-fit catalytic converter, rear three-quarter view of the turntable spin

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MagnaFlow 51812 oem grade direct-fit catalytic converter, rear view of the turntable spin

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MagnaFlow 51812 oem grade direct-fit catalytic converter, opposite side view of the turntable spin

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MagnaFlow 51812 oem grade direct-fit catalytic converter, opposite front three-quarter view of the turntable spin

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MagnaFlow 51812 oem grade direct-fit catalytic converter, side view of the turntable spin

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MagnaFlow 51812 oem grade direct-fit catalytic converter, opposite rear three-quarter view of the turntable spin

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MagnaFlow OEM Converter 2011-2019 Chevrolet Silverado 3500 HD 51812

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Brand: MagnaflowSKU / Part #: MAG51812

Regular price: $1,644.00
Regular price: ~~$1,644.00~~
Sale price: $1,644.00
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Subtotal: $1,644.00

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MagnaFlow OEM Converter 2011-2019 Chevrolet Silverado 3500 HD 51812

Subtotal: $1,644.00

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Overview

A 2011-2019 Chevrolet Silverado 3500 HD / 2500 HD 6.0L with a tired catalyst needs a replacement that keeps the readiness monitors happy. MagnaFlow's OEM Grade 51812 is built for exactly that job and bolts in without cutting or welding. Listed applications: 2011-2019 Chevrolet Silverado 3500 HD (LTZ, WT, High Country), 2011-2019 Chevrolet Silverado 2500 HD (High Country, LT, LTZ, WT), 2011-2019 GMC Sierra 2500 HD (Base, Denali, SLE, SLT) and 2011-2019 GMC Sierra 3500 HD (Base, Denali, SLE, SLT, WT). It interchanges with OE 23424746. It ships at roughly 25 lb.

Features

OEM Grade loading sized for the 6.0L OBD-II catalyst monitor
Replaces OE 23424746
Fits 2011-2019 Chevrolet Silverado 3500 HD: LTZ, WT, High Country
Fits 2011-2019 Chevrolet Silverado 2500 HD: High Country, LT, LTZ, WT
Fits 2011-2019 GMC Sierra 2500 HD: Base, Denali, SLE, SLT
1 further model listed in the fitment table

What is in the box

Gaskets and mounting hardware for installation

Specs

Part number	51812
Type	OEM Grade Direct-Fit Catalytic Converter
Emissions	Federal/EPA compliant (not for CARB states)
Grade	OEM Grade
Material	16-gauge 409 stainless steel
Replaces OE	23424746
Shipping weight	25 lb

Construction

OEM Grade catalyst loading for engines with sensitive OBD-II efficiency monitoring
Bolts in where the original sat, with no cutting or welding
Body and pipes in 16-gauge 409 stainless steel
Spun body closed with a single laser-fusion weld to resist leaks
Mandrel-bent inlet and outlet pipes keep factory flow
OE-sized 410 stainless hangers
308 stainless MIG welds
Shape developed from 3D scans of the original part
Replaces OE part 23424746

Installation

Direct-fit and bolt-on; a capable DIYer can install it with the right tools, though professional installation is recommended.

Fitment notes

Sold for federal (EPA) emissions use only; it cannot be sold or installed in California, Colorado or New York. Check the fitment table below against your vehicle, including trim and engine.

Fitment

Make	Model	Chassis	Year	Engine
Chevrolet	Silverado 3500 HD (LTZ, WT, High Country)	—	2011-2019	6.0L
Chevrolet	Silverado 2500 HD (High Country, LT, LTZ, WT)	—	2011-2019	6.0L
GMC	Sierra 2500 HD (Base, Denali, SLE, SLT)	—	2011-2019	6.0L
GMC	Sierra 3500 HD (Base, Denali, SLE, SLT, WT)	—	2011-2019	6.0L

Fitment

Year	Make	Model
2011–2019	Chevrolet	Silverado 3500 HD
2011–2019	Chevrolet	Silverado 2500 HD
2011–2019	GMC	Sierra 2500 HD
2011–2019	GMC	Sierra 3500 HD

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

Reviews & questions